ONLINE HELP
 WINDEVWEBDEV AND WINDEV MOBILE

Version: 2026

Declaring and using a variable
A variable is defined by name and type...
Service variable
The Service variable is used to...
Report based on a variable (Data binding)
A report based on a variable is used to directly print the information found in a WLanguage variable...
Composite variable
A composite variable contains different types of elements (members)...
TypeVar (Function)
Identifies the type of an expression, a variable (during a call to a procedure for example) or a control.
Advanced types
The advanced types of WLanguage are as follows
Checkers available in the code editor
The code editor proposes several tools used to correct the code...
WLanguage types
The different types in WLanguage are...
IsNumeric (Function)
Enables you to find out whether a variable or a control is:
  • a numeric (integer, real, currency or numeric).
  • a string that can be converted into numeric.
Assignment operators
Three assignment operators are available...
Constant
The constants are language elements whose value is fixed once and for all...
<Source>.Reset (Function)
Initializes:
  • one or all variables of file items with their default values.
  • one or all items of a Record variable with their default values.
HReset (Function)
Initializes:
  • one or all variables of file items with their default values.
  • one or all items of a Record variable with their default values.
Type inference
The type inference is used to simplify the declaration of variables when the variable type can be automatically deduced by the compiler...
Code style
A code style is used to automatically prefix the name of all the variables and project elements (windows, report controls, classes, etc.
HManageServerUpdate (Function)
Used to manage the automatic update of HFSQL Client/Server servers by specifying the check...
Using Facebook authentication
Facebook is the world's most popular social network. It is commonly used by companies to reach...
DocStartModification (Function)
Signals the start of grouping for a set of operations on a document in a single event (management...
HInfoView (Function)
Returns information about a materialized view.
HStartServerUpdate (Function)
Used to immediately start the automatic server update.
AIDetectModel (Function)
Runs a trained neural network model on an image. This function allows you to use artificial...
<modbusSession>.ReadRegister (Function)
Reads one or more registers from a Modbus slave, starting at a specific address.
<modbusSession>.ReadFloat (Function)
Reads one or more single-precision floats from a Modbus slave, starting at a specific address.
Count (Property)
The Count property returns the number of elements in a given set.
HAddLink (Function)
Adds an integrity rule between two data files on the server.
HCopyFile (Function)
Copies an HFSQL data file (.fic, .ndx and .mmo files if they exist): from the HFSQL server...
xlsClose (Function)
Closes an XLS file.
HDisconnectClient (Function)
Displays a message on the Client computer(s) and disconnects the application.
HSendMessageToClient (Function)
Displays a message on the client computers.
DiagramSave (Function)
Saves a diagram as a "diag" file.
AuthRefreshToken (Function)
Refreshes a user's OAuth2 token when it expires....
fChangeSize (Function)
Resizes an external file.
oDriveConnect( Function)
Creates a connection to an Drive OneDrive.
OrganizerDisplay (Function)
Reinitializes the content of an Organizer control from its data source (HFSQL data file...
fOpenTempFile (Function)
Creates and opens a temporary file.
EndService (Function)
Ends the execution of the current service.